Electronic Device and Method of Transmitting and Receiving Information by Electronic Device

1. A first electronic device comprising: a transceiver; a display unit; an input unit; and a processor configured to: control the display unit to display an execution screen of an application for transmitting first information to a second electronic device, wherein a button to encrypt the first information to be transmitted to the second electronic device is displayed on the execution screen, determine second information related to a communication performed between the first electronic device and the second electronic device, wherein the second information related to the communication includes at least one of a transmitted or received message log, a social network service log, a call log, an e-mail log, or an initial or last call time, in response to the determining that the button is selected, encrypt data inputted through the input unit after the button is selected, by using an encryption key which is generated based on the second information related to the communication, and control the transceiver to transmit the encrypted data to the second electronic device.

2. The first electronic device of claim 1 , further comprising a display configured to display the second information related to the communication.

3. The first electronic device of claim 1 , wherein the second information related to the communication is at least one of text information, an image, a dynamic image, sound source information, location information, or address book information.

4. The first electronic device of claim 1 , wherein the processor is further configured to: control the transceiver to transmit a first hash value generated by hashing the second information related to the communication to the second electronic device, control the transceiver to receive a second hash value from the second electronic device, and when the received second hash value is equal to the first hash value, generate an encryption key for encrypting the second information related to the communication by using a part of the second information related to the communication.

5. The first electronic device of claim 1 , wherein the processor is further configured to encrypt a part of the data input before the button is re-selected from among the data.

6. The first electronic device of claim 1 , wherein, when the second information related to the communication is text information, the processor is further configured to encrypt at least one sentence including a set word in the text information by an encryption key generated based on the text information.

7. The first electronic device of claim 1 , wherein, when the second information related to the communication is an image, the processor is further configured to encrypt an area selected in the image by an encryption key generated based on third information related to the image.

8. The first electronic device of claim 1 , wherein, when the second information related to the communication is a dynamic image, the processor is further configured to encrypt a reproduction section selected in the dynamic image by an encryption key generated based on fourth information related to the dynamic image.

9. The first electronic device of claim 1 , wherein the processor is further configured to: receive fifth information having an encrypted part from the second electronic device, and decrypt the fifth information having the encrypted part based on the second information related to the communication.

10. The first electronic device of claim 2 , wherein the display is further configured to display a first input window for selecting a recipient, a second input window for inputting text information, and a first button on an execution screen, wherein the first button is a button for attaching an image, a picture, or a file.

11. A second electronic device comprising: a transceiver; and a processor configured to: control the transceiver to identify information related to a communication performed between a first electronic device and the second electronic device, control the transceiver to receive encrypted data from the first electronic device, wherein the encrypted data is encrypted by an encryption key which is generated based on the information related to the communication after a button displayed in the first electronic device is selected, and decrypt the encrypted data based on the information related to the communication, wherein the information related to the communication includes at least one of a transmitted or received message log, a social network service log, a call log, an e-mail log, or an initial or last call time.

12. The second electronic device of claim 11 , further comprising a display configured to: display the received information related to the communication such that the encrypted data cannot be identified, and when the encrypted data is decrypted, display the information related to the communication such that the encrypted data can be identified.

13. The second electronic device of claim 11 , wherein the processor is further configured to: control the transceiver to receive a first hash value generated by hashing the information related to the communication from the first electronic device, extract the information related to the communication corresponding to the received first hash value, transmit a second hash value generated by hashing the information related to the communication corresponding to the received first hash value, to the first electronic device, and when the first hash value and the second has value are equal to each other, generate a decryption key for decrypting the information related to the communication by using a part of the information related to the communication corresponding to the first hash value.

14. A method of transmitting first information by a first electronic device, the method comprising: displaying an execution screen of an application for transmitting first information to a second electronic device, wherein a button to encrypt the first information to be transmitted to the second electronic device is displayed on the execution screen; identifying second information related to a communication performed between the first electronic device and a second electronic device, wherein the second information related to the communication includes at least one of a transmitted or received message log, a social network service log, a call log, an e-mail log, or an initial or last call time; in response to the determining that the button is selected, encrypting data inputted through an input unit after the button is selected, by using an encryption key which is generated based on the identified second information related to the communication; and transmitting the encrypted data to the communication to the second electronic device.

15. The method of claim 14 , wherein the second information related to the communication is at least one of text information, an image, a dynamic image, sound source information, location information, or address book information.

16. The method of claim 14 , wherein the identifying of the second information related to the communication performed between the first electronic device and the second electronic device comprises: extracting the second information related to the communication based on information on the second electronic device; transmitting a first hash value to the second electronic device that is generated by hashing the extracted second information related to the communication; receiving a second hash value from the second electronic device; and generating an encryption key for encrypting the second information related to the communication based on a part of the second information related to the communication when the received second hash value is equal to the first hash value.

17. The method of claim 14 , further comprising encrypting a part of the data input before the button is re-selected from among the data.

18. The method of claim 14 , further comprising: when the second information related to the communication is text information, identifying at least one sentence including a set word in the received or stored text information; and encrypting the at least one identified sentence by an encryption key generated based on the text information.

19. The method of claim 14 , further comprising: when the second information related to the communication is an image, receiving a selection of a part of areas of the image; and encrypting the selected area by an encryption key generated based on third information related to the image.

20. The method of claim 14 , further comprising: when the second information related to the communication is a dynamic image, receiving a selection of a part of reproduction sections in the dynamic image; and encrypting the selected reproduction section by an encryption key generated based on fourth information related to the dynamic image.

21. The method of claim 14 , further comprising: receiving fifth information having an encrypted part from the second electronic device; and decrypting the fifth information having the encrypted part based on the second information related to the communication.

22. A method of receiving information by a second electronic device, the method comprising: identifying information related to a communication performed between a first electronic device and the second electronic device; receiving encrypted data from the first electronic device, wherein the encrypted data is encrypted by an encryption key which is generated based on the information related to the communication after a button displayed in the first electronic device is selected; and decrypting the encrypted data based on the identified information related to the communication, wherein the information related to the communication includes at least one of a transmitted or received message log, a social network service log, a call log, an e-mail log, or an initial or last call time.

23. The method of claim 22 , further comprising: displaying the received the information related to the communication such that the encrypted data cannot be identified; and when the encrypted part is decrypted, displaying the information related to the communication such that the encrypted part can be identified.

24. The method of claim 22 , wherein the identifying of the information related to the communication performed between the first electronic device and the second electronic device comprises: receiving a first hash value generated by hashing the information related to the communication from the first electronic device; extracting the information related to the communication corresponding to the received first hash value; transmitting a second hash value generated by hashing the extracted information related to the communication corresponding to the received first hash value, to the first electronic device; and when the first hash value and the second has value are equal to each other, generating a decryption key for decrypting the encrypted information related to the communication by using a part of the information related to the communication corresponding to the first hash value.

25. A non-transitory computer-readable recording medium having a program recorded therein to be executed in a computer, the program comprising executable commands for performing a process to be performed by a processor, the process comprising: displaying an execution screen of an application for transmitting first information to a second electronic device, wherein a button to encrypt the first information to be transmitted to the second electronic device is displayed on the execution screen; identifying second information related to a communication performed between a first electronic device and a second electronic device, wherein the second information related to the communication includes at least one of a transmitted or received message log, a social network service log, a call log, an e-mail log, or an initial or last call time; in response to the determining that the button is selected, encrypting data inputted through an input unit after the button is selected, by using an encryption key which is generated based on the identified second information related to the communication; and transmitting the encrypted data to the second electronic device.

26. A non-transitory computer-readable recording medium having a program recorded therein to be executed in a computer, the program comprising executable commands for performing a process to be performed by a processor, the process comprising: identifying information related to a communication performed between a first electronic device and a second electronic device; receiving encrypted data from the first electronic device, wherein the encrypted data is encrypted by an encryption key which is generated based on the information related to the communication after a button displayed in the first electronic device is selected; and decrypting the encrypted data based on the identified information related to the communication, wherein the information related to the communication includes at least one of a transmitted or received message log, a social network service log, a call log, an e-mail log, or an initial or last call time.